Coreflux HUB desktop with the app dock and the status bar (connectors, license, time, and broker menu)
Why Use the Coreflux HUB?
You need a single place to manage your broker without installing extra tools or connecting via the command line. The Coreflux HUB gives you an interface to explore topics, create and edit LoT (Language of Things) definitions, configure connectors, and monitor system status—all from one dashboard. It is available as a browser app (its own container, via Docker Compose) or as a standalone desktop application for Windows and Linux.The Coreflux HUB is a separate container from the broker — it is not bundled in the broker image. Run it with Docker or Docker Compose (open
http://localhost:3000) or as a standalone desktop application for Windows x64, Linux x64, and Linux ARM64. See Installation for Docker commands, Compose profiles, the HUB desktop app, and the login flow. Download builds from the Downloads page. An installed desktop app updates itself — see Update the HUB desktop app.A web HUB (Docker or Docker Compose) can be installed from the browser as an app that opens in its own window. After the page loads, use the browser’s install control — often Install or Add to Home Screen. Browsers offer this on
localhost and on HTTPS. The desktop app is already installed and does not use this.When to Use the HUB
- Manage everything from the HUB — Configure your broker, deploy logic, and set up data connectors without installing desktop tools
- Go from idea to deployment in minutes — Write and deploy Actions, Models, and Rules directly in the built-in editor
- Monitor your system in real time — See device connections, data flow, and system health at a glance
- Diagnose issues fast — Inspect live MQTT messages and run broker commands from one interface
Prerequisites
Install the HUB (and the broker, if you do not already have one) from Installation. Afterdocker compose --profile full up, open http://localhost:3000, click New Connection, and set Host to broker (Protocol mqtt://, Port 1883). The desktop app is on the HUB desktop tab of that page.
To open brokers your organization registered at portal.coreflux.org, use Coreflux Fleet on the login card instead of New Connection. See Account, fleet, and Cloud mode.
How the HUB Is Organized
The HUB is built around six apps. Each app groups related tools so you can switch between tasks without leaving the browser. Cluster Viewer is Beta. Its dock icon, labeled Cluster, appears only when the broker host you are connected to is in a cluster.MQTT
Explore topics, publish messages, and view connected clients.
LoT Editor
Create and edit Actions, Models, and Rules in the browser.
Dashboards
Build live panels with gauges, charts, and controls bound to broker data.
Connectors
Add, configure, and monitor connectors with templates or LoT code.
System
Broker configuration, user management, trace logs, and command console.
Cluster Viewer
See nodes, the leader, links, and ownership on a clustered broker host. Beta.
Connected to a generic MQTT broker, the dock keeps Data Viewer and UNS Viewer. Coreflux apps stay hidden, and the status bar offers Know more about Coreflux. See When the broker is not Coreflux.
MQTT
Browse live data flowing through your broker. The MQTT app includes a Data Viewer for subscribing to topics and publishing test messages, and a Connected Clients view to see which devices are online.
Data Viewer: the topic tree filtered to a site, with a topic pinned on the right showing its message timeline and payload
LoT Editor
Write and deploy logic directly in the HUB. The LoT Editor is a notebook editor: cells hold LoT, Python, or Markdown, each cell deploys on its own, and the sidebar lists everything currently running on the broker — no external tools required.
LoT Editor with the live project's notebook open: Projects, Broker runtime, Configuration, and Library in the sidebar, with Deployed and Deploy All in the header
Dashboards
Design operator-facing screens from a component library—gauges, charts, industrial symbols, and controls—and bind each widget to live data on your broker. The Dashboard Manager lists your panels; open one to preview or use it full screen for walls and shared links.
Dashboards: a published panel with a live 3D site view and KPI cards bound to broker topics
Connectors
Connect your broker to databases, PLCs, and external systems. The Connectors app shows each connector as a card with a live status indicator, and lets you configure connectors visually or in LoT code.
Connectors Manager: connector cards with type badges, live status dots, and quick actions
System
Administer the broker itself. The System app provides Broker Configuration, User Management, a Command Console for direct broker commands, and Broker Logs for real-time diagnostics.
The broker menu in the status bar: broker tools, HUB settings, and help
Cluster Viewer
See how the broker hosts in a cluster fit together: who leads, which links are up, which node owns each exclusive piece of LoT, and how partitions are placed. Open Cluster on the dock. The window carries a Beta badge, and the icon is there only while that broker host publishes cluster status. See Cluster Viewer.Desktop shell
The desktop layout keeps a Coreflux logo at the top left, a status bar at the top right, and the app dock along one edge of the screen. The logo returns you to the desktop. The account pill on the status bar opens broker tools and settings for this HUB install. You get this layout in the standalone app and in a desktop browser. A phone keeps a full-width bar and leaves these saved preferences unchanged.Logo and the account pill
Click the Coreflux logo to show the desktop. Every open window minimizes. The logo hides and returns together with the status bar. The account pill shows your display name while you are connected, and Disconnected when you are not. Open it for the sections below.
Switch user appears when the current connection has more than one identity. Switch broker appears when this HUB has another saved connection. Log out ends the session. See Connections Manager for identities and saved connections.
First-run walkthroughs
The first time you open the HUB, a Hub tour walks the desktop. The first time you open an app, a short tour of that app runs. Help → Walkthroughs replays a tour, and the same menu offers Mark all walkthroughs done and Reset all walkthroughs. Whether you have already seen a tour is stored for this browser profile, or for this desktop install.Hub Settings
Open the account pill, choose Hub, then Hub Settings. The window configures this HUB install, and you can open it without system access on the broker host. Changes apply as you make them.Dock and status bar
Right-click the dock bar — the strip behind the icons — to set its layout. Right-click an app icon to open that window’s own menu.
Left and Right turn the dock into a vertical column. The dock draws over your windows, and the workspace keeps its full size.
Right-click the status bar to set when it hides.
The same three controls are under Hub Settings → Desktop. The HUB saves them for this install. When a bar is hidden, move the pointer to its edge to bring it back.
When fullscreen hides that bar while a window is fullscreen. A zoomed window leaves the dock and status bar where they are.
Zoom and fullscreen
A dock set to Never stays on screen during fullscreen. When fullscreen on the dock hides the dock only in that state.
Next Steps
Installation
Run the HUB with Docker, Compose, or the desktop app — then connect from New Connection.
Connections Manager
Save multiple brokers, secure them with TLS, and switch between them.
Data Viewer
Subscribe to topics and publish messages from the browser.